Instead of sets of, say, 10—which you can't do yet—do a set of just one or two reps. Then rest (or do another exercise), and come back for another push-up or two. You may want to do more sets ...
The Z press builds upper-body strength and stability from a seated position. Here's how to do it and the benefits.
How many push-ups can you do? Your push-up capacity indicates your heart health. Find out the ideal number and what it means for your cardiovascular fitness.